Preparation of Graphene Oxide Based on Expanded Graphite

作者：Li Lai Liu, Mao Zhong An, Shan Chao Xing, Xiao Jun Shen, Chen Yang, Xin Long Xu · 发表于：Advanced materials research · 年份：2014 · DOI：10.4028/www.scientific.net/amr.881-883.1083 · 被引用次数：4 · 研究领域：Graphene research and applications、Graphene and Nanomaterials Applications、Advancements in Battery Materials

Graphene oxide with high degree of oxidation and peelable has been prepared by two-step oxidation method used large flake graphite. The expanded graphite was prepared firstly and then prepared graphene oxide via further oxidation. The influence of oxidation time, oxidant dosage and high temperature reaction on the structure and degree of oxidation were studied. The morphology and structure of graphene oxide were characterized by X-ray diffraction, fourier transform infrared spectra, scanning electron microscope and transmission electron microscope. It was found that high degree of oxidation and large specific surface area graphene oxide was prepared at the ratio of sulfuric acid and expanded graphite was 75 mL : 1 g, the ratio of potassium permanganate and expanded graphite was 4 g : 1 g and the oxidation time at 35 °C was 24 h. This technology is simple without high-temperature reaction process, and solved the problem of low oxidation efficiency when used the large flake graphite as raw materials.